The MPLS WG Archive

["Andrzej Czerczak" <Andrzej_Czerczak/HeadQ@netia.pl>]

Robert,
First of all thanks for your comments.

>Have you read draft MPLS Support of Differentiated Services
>draft-ietf-mpls-diff-ext-04.txt where we are proposing to use the ECN
>(explicit congestion notification) on a per LSP basis using the EXP bits
>in the shim header ? Currently this is the most attractive option, but I
> am not aware of any implementation support this today.



a) Document draft-ietf-mpls-diff-ext-04.txt does not not define the usage
of ECN.

b) Taking into account label merging capabilites of LSRs, how can determine
to which ingress LSP to to send Congestion Notification?

c) Where can I find:

Ramakrishnan et al., "A Proposal to Incorporate ECN in
   MPLS", draft-ietf-mpls-ecn-00.txt?



What I'd like to say is, that at least during first phases of
implementations (before entire infrastructure will become IP) interworking
of MPLS core and ATM edge will be important, but I could not find a
proposal of how to do interworking between them.



Andrzej